Concrete-mixer.



,P. A. KOEHRING.

cononnwi: MIXER. APPLICATION mum an 15, 1907.

399,414, Patented Sept; 22, 1908.

2 BEBETB -BHEBT 1.

WITNESSES: IN VENTOR @WM 1 y 'iz' J/X Jg A mRNE Y8 P. A. KOEHRING. CONCRETE MIXER.

APPLIOATIO! TILED IL! 15. 1907.

2 S SETS-SHEET 2.

Patented Sept. 22, 1908.

-: vtft'itiriigsftnamsii at: (115mm :ogrmmm om m To all whom-Haneyconcern i. 'Bedt-wknoiwn thatJ PmnnvA. Konniu'xo,

a cititeh blot-hi: United States,-residing sit Milwutikee'ieot'lhty of Milwaukee, and State i ,w of \l 'isemnsni; have invented new and-usellul thetollou -ing'ism specification.

Improvements 'in-@o'ncrcte-Mixcrs, ofwhich My lnjventlon"frelatesto that class oi cons crete mixersy-in which cement, sandland other *inateii'zilof which the concrete ism-omposed, arejnixcd together 'pre 'iaratorv to cirig:-ti'se l within a revolub'le drum aiid'it pertains more especially 'ain'o'ng'oth'e'r things,

to the 111eans'"e1n'ployed for discharging the" concrct' from the outlet toward the inlet side of the druinand for distil'iarg'iiig the same when properly mix'ed from the drujn while the some is being revolved'into 'a 's'ta' tionary' receptacle.

The construction of my devic''is eiplained by.--.referenee to theaccompanying drawings" show the'ihterior of the drum. Fig. 2*is'an the procket wheel (3, wheel supporting shaft- 7, pinions S and two annular series of co;

are secured teeth 9, U, which series of teeth 9 The shaft 7 to the periphery of the drum. is sup 1iorted from the frame 2 at its respective ends from the'brac-k'et 10. The mech anism thus far d. ribed is-substantially of ordinary 'constructioi v invention pertains more especially, as previously suggested, to the means employed. for discharging the contents of the drum therefrom as the same is being revolved as hereinafter described. The buckets of the series 1'2 comprise the bottom portion 13, the lower end 14 which curves upwardly and ter minutes ilush with the upper edge l5, reference being bad to the position of said buckets as shown in Figs. 2 and 3, while the rear wall 16 is formed at substantially riqht angles to the bottom portion l i'and said buckets are secured to the inner irull of the drum by a plurality of rivets l7.

' and inwardly Specification:qf 'Le tters Fin st. "r jte t ki Sept, 22f,'"190s." Application filed May. 1907.

1 Serial Roi annea Each alternate-"bucket A-"ot the seriesis preferably made longer th an'tlie'ii terfnediate adapted as the dru n' is :r'evo vetfl to diselrange the'i r cont i toxiardthii r'itl pfi use-time upon the" left handside"tlidi'edf"i\*l'iife 'usae-li' alternate bucket B inclines downiviiikl e ward the right a to the b uckeits'hi whizleli'v'fthe'icolt'telt s d such buckets as the drum is 'revol'tietl wi' t ll discharged toward" tl'iti iii-um.- rms is "San d'i-ti is rmwsa trig contents {therein wi'llf'be 'alt eiflatl *"tlhod'tf toward thfejrlglut 'i tndleft, 'the'sanie iei'ng'dis charged fro'ihth buckets o f'tlle ases-astray approach and firisi aljotle "the longi tu'diii al axis of the dru'ni, whereb v ltlre'jcontents tiftli'p 'drunrbecrymes thoroughlyjlnixed.'1 "f5 When the contents 'o'f' the drum has b'e en tho i-sc (any mixed, tit-6i same is discharged therefrom while lt he' 'jd rti iir' is 'l'cvolfi n'rg through the ii'votally' supported troiiglfllfi and the stationary I H The trough 1S is pivotallfstippdrtedat Its I'GSPCCtlXG sides from the horizontal arms 19' upon the pivotal bolt or rod 20, said arms 19' being connected with the frame 21 by the standard 22 in the ordina manner.

While the concrete is being mixed preparasupported trough 18 is inclined downwardly as indicated in dotted lines in Fig. 1, whereby the concrete as it falls from the buckets therein will disehar e toward the left hand side of the drum, re erenee being had to 1* ig. 1. When, however, the concrete has been sufficiently mixed to discharge the same, the tren h 181s turned upon its supporting pivot 20 from the position indicated in dotted lines, to that shown, in Fig. 1, when its outer portion is adaptedto rest within the inner end of the portion 19, whereby as the concrete is carriet up by the revolving buckets it will be dlSCllMfiE-tl from the drum through said pivotal trou 1 l8 and stationary extension 19 thereof. communicated to the pivotall supported trou h for the purpose of inclining the same in t ie two ositions shown and md1cated through the e bow crank lever 23, pivotal bolt 24, link 25, pivotal bolt 27 and lever 28, the

xtension; thereto,

tory to discharging the sanie, the pivotally l/Iotion is d l estc'siitede' and it is desirous elbow cranklever 23 is pivotally su ported from one of the arms 19 u on the olt 29; Thus it will be obvious t at by pressing downwardly upon the arm-30 of the elbow crank lever 23. motion will be communicated to the pivotally sup orted trough 18 and the same will be incline from the osition shown to that indicated in dotted lines in Fig. 1. When, however, it is desirous to discharge the contents of the drum therefrom, said trough is brought back to'its normal position shown by drawing upwardly u on the arm 30. 31 is a be per through w ich the material to be mixed is discharged into the drum as the same is being revolved. The hopper 31 is six ported from the su porting frame of the N511 with which standards it is connected by the rivets 33 in the ordinary manner. The frame 2 u n which the drum 1 is supported is prefera ly supported on a wheeled vehicle of ordinary construction by which the machine is readily transported from one place to another.

The respective ends of the drum 1 are preferably curved inwardly toward the center of the drum, whereby the concrete mixed therein has a tendency as the drum is revolved to be thrown by gravity toward the center of the drum in position to be acted u on and elevated b the annular series of hue ets and whereby the tendency of the concrete to accumulate as-heretofore in the corners between the ends and the periphery of the drumis thereby avoided.

It will be understood that the arm 28 is rigidly affixed to the side of the trou h 18 by nails, screws, or in any ordina weli known manner. It will also'be lll'K erstood that when the trou h 18 is inclined in the position indicated in fotted lines in Fig. 1, the con- 'cle upon the stan ards 32 crete which is deposited therein by the revolvin drum will be discharged toward the inlet side of the drum. Also that when said trough is inclined in the opposite direct-ion as shown in Fig. 1, the concrete will be discharged from the drum into the stationary trough 19.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is,

v 1. In a concrete mixer, the combination of a revoluble drum having separate receiving and discharge openings at its res ective ends, a stationary hop er having its ischarge end within -one of t e openings of said drum, arms connected with the drum supporting frame and projecting into the drum at its dischar e end, a reversely inclinable trough pivoted means for manually changing the inclination of said trough upon its pivotal support.

2. In a concrete mixer, the combination of a revoluble drum having separate receiving and discharge openin s at its res ective ends, a stationary hopper, having its iseharge end within one of the openings of said drum, a stationary trough supported from the exterior near the op osite end of said drum, arms connected with the drum supporting 'frame and projecting into the drum at its discharge end only, and a reversely inclinable trough pivoted to the inner ends of said arms and adapted to contact with said stationary trough.

In testimony whereof I afiix my signature in the presence of two witnesses.

PHILIP A. KOEHRING.

Witnesses JAS. B. EnwrN, O. R. ERWIN.

to the inner ends of said arms and 

